Dial cleaner for automatic telephones



Jan. 14.1, 1930. A l3|s sn=\ v|v 1,743,312

DIAL CLEANER FOR AUTIATIC TELEPHONES Filed Ooi. 24, 1927 y y ,Q1/ways.

Patented Jan. 14, 1930 UNITED STATES AUGUSTO BISSIRI, F LOS ANGELES, CALIFORNIA DIAL CLEANER FOR AUTOMATIC TELEPHONES Application filed October 24, 1927. SeralNo. 228,311.

My invention relates to cleaners, and more especially to a cleaner adapted to be secured to a dial indicator and to establish brushing contact with the dial to clean the same when the indicator moves thereover.

bodiment of my invention is the provision of a cleaner adapted to be instantly secured to, or removed from, the indicator of an automatic telephone, and having a wiper extending therefrom to establish brushing contact withthe dial of the telephone so as to wipe the dust from the dial as the indicator is operated.

Another object is the provision of a cleaner of the above described nature, which will in no manner interfere with the normal operation of the indicator or other parts of the telephone.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of my invention which is illustrated in the drawings accompanying and forming a part of the specification. It is to be understood that I do not limit myself to the showing made by the said drawings and description, as I may adopt variations of the preferred form within the scope 0f my invention as set forth in the claims.

Referring to the accompanying drawings, Figure 1 is a perspective view Vof an automatic telephone showing the dial cleaner of my invention, mounted thereon for position m use.

Fig. 2 is a plan view of the indicating dial of the telephone of Figure 1, with my dial cleaner mounted thereupon.

Fig. 3 is a sectional view 0f the indicating dial, showing my cleaner in elevation. rIhe plane of section is indicated by the line 3 3 of Figure 2..

Fig. 4 is an end view of my dial cleaner and a portion of the indicating dial, the direction of view being indicated by the arrow 4 of Figure 2. n

In terms of broad inclusion, my invention comprises a cleaner adapted to be secured to 5o an indicator mounted for movement over a One of the objects of the preferred emf dial, the cleaner being of such nature and Vso positioned that it extends to the dial to establish brushing contact therewith, so that it will wipe accumulated dust from the'dial as the indicator' is moved across its'V face.`

Thel preferred embodiment of my inven-Y tionis intended for use with a standard automatic telephone 1, having a dial'2 fixed to the base 3, and a movable indicating dial '4 mounted above the fixed dial-2. A plurality of characters are printed'upon the fixed dial 2, and-va pluralitywofapertures 6 are provided in the indicating dial 4, one above each of thecharacters. In order to calla number when usingvsuc'h a telephone, the operator inserts his finger or a pencil 'into the aperture above the selected character,'and then rotates the indicating` dial in ytheproper direction until encountering the'stop 7 rigid with the base 3 and extending over the indicating dial4. I

Ordinarily, one difficulty with such telephones is the fact that in a short time, dust will accumulate upon the fixed dial 2, oftentimes to such an extent as to be unsightly and insanitary, and even to obliterate the characters on the dial 2.

It is a purpose of this invention to overcome this difliculty; and I accomplish this by means of my impro-ved dial cleaner which comprises a base 11 having a fiange 12 extending upwards and backwards therefrom as best shown in Figures 3 and 4. A pair of flanges 13 and 1.4, extend downwards from the base 11. All of the structure so far described is of such simple nature that it may be stamped and formed from a single sheet of suitable material which should have a sufficient degree of rigidity however, so that the Y indicating dial 4 of the telephone may be clamped between the base 11 and upper flange 12 to hold the cleaner in position. A wiper 16 is retained between the flanges 13 and 14, and is of such proportions that it extends to the fixed dial 2 and establishes brushing contact therewith.

It is thus seen that a wiper is provided o-f very small proportions, instantly attachable Y to the indicating dial 4 or removable therefrom. It is essential that the wiper be quite small, because in operation, it is necessary for the Wiper to pass freely under the stop 7 so as not to interfere with the normal operation of the indicating dial.

When the indicating dial is turned, as previously described, the Wiper 16 brushes across the surface of the fixed dial 2, wiping the dust therefrom. The wiper 16 maybe of felt, the lower edges of which may be provided with a plurality of serrations 17 or, it may be composed of any other Well known form of brush.

From the foregoing, it isthought that the construction, use and many advantages' of the herein described .dial cleaner,y will be readily apparent Without further description.

I 'relai-rn: Y

l.v A cleaner for a dial having an indicator mounted for movement acrossthe face thereof,-

cleaner comprising a base,'a resilient retaining flange carried. by said base and formed of ya continuation of one end of the base bent backi npon itself whereby the cleaner may be frictionally engaged upon said indicator, and a wiper `secured to said base perpendicul-arly to the plane thereo'ff 2. A. cleaner for a dial having ansi-ndivcater. mounted. for movement across the face thereof, said cleaner conflprislngr av base, .as

flat retaining flange extending resiliently from said base and formed. of .a continuation of onel end of the base bent back upon itself whereby the cleaner may be frictionally yengaged upon said indicator; and a Wiper secured to said Ybase perpendieula-rly to the plane thereof.

Intestimony whereof I have signedv my .name to this specification.

, AUGUSTO BISSIRI.. 

